In spite of the ridiculous, cucumber alien monster (which is fortunatedly kept off-screen through most of the film) this is actually an intelligent science-fiction thriller that's very much in an OUTER LIMITS vein.
Misanthropic scientist Lee Van Cleef makes contact with a being from Venus who promises to save mankind from his own self-destruction. Cleef paves the way for the alien to come to Earth, where it hides out in a hot springs cave outside of a small, remote Southern Californian town. Upon arriving, the being (or should I say invader) proves to have sinister plans of its own.
This early Corman quickie is quite good as long as you're not evaluating it based by today's high-tech standards. It's naive and unsportmanslike to condemn a film just because it was made decades before CGI was even invented.
The film has a certain disquieting mood about it. The remote setting adds to the sense of paranoia and isolation, and though the plot is sometimes critizied as being awkward, that tells me that the critic may be a short attention span member. You need to put some brainwork into your film viewing if you wish to gain any savory qualities from it. Whining because a planet isn't exploding every other minute is very superficial, and true science-fiction isn't for the shallow non-thinker who only has instant, immediate gratification on his non-mind.
A subtle sense of terror builds throughout (similar to INVASION OF THE BODY SNATCHERS) as nearly the entire cast meet unspeakable fates. The story carrys a pertinent cautionary message: Blind devotion to a utopian ideal can lead to the worst kind of disillusionment and tragedy. History has taught us that many times over. Science-fiction is meant to be provocative and not just shallow, forgettable entertainment.
Sure, if this film had a higher budget, and perhaps a little more script polishing, it could have been one of the top fifties science-fiction films. As it is, it's interesting with intriguing possibilities, and as long as YOU haven't been taken over by high-tech effects and sales hype, you may find it worth taking a look at.
